Cooling down on a plane involves a combination of controlling your immediate environment and managing your own physiology. First, locate the overhead "gasper" (air vent) and turn it to full power, aiming it directly at your face or neck; this air is filtered and usually much cooler than the ambient cabin temperature. If the plane is sitting on the tarmac with the engines off, the AC may be weak, so carry a small portable handheld fan or a cooling "neck towel." Dressing in natural fiber layers like cotton or linen is essential, as synthetic fabrics trap heat. Hydration is key; drink cold water and avoid caffeine or alcohol, which can make you feel warmer by increasing your heart rate. Another effective trick is to apply cold water or an ice pack to your "pulse points"—the insides of your wrists and the back of your neck. If you are in a window seat and the sun is beating down on you, close the window shade immediately to reduce the "greenhouse effect." In 2026, some travelers also bring static-cling sun shades for the window. Finally, stay still; excessive movement or fidgeting generates body heat, so try to remain calm and relaxed to keep your internal temperature stable.